Results 101 to 110 of about 726,750 (238)

On the origins of enigmatic stellar populations in Local Group galactic nuclei [PDF]

, 2016
We consider the origins of enigmatic stellar populations in four Local Group galactic nuclei, specifically the Milky Way, M31, M32 and M33. These are centrally concentrated blue stars, found in three out of the four nuclear star clusters (NSCs ...
N. Leigh, F. Antonini, N. Stone, M. Shara, D. Merritt   +4 more
semanticscholar   +1 more source

The Role of Dwarf Galaxy Interactions in Shaping the Magellanic System and Implications for Magellanic Irregulars

, 2012
We present a novel pair of numerical models of the interaction history between the Large and Small Magellanic Clouds (LMC and SMC, respectively) and our Milky Way (MW) in light of recent high precision proper motions (Kallivayalil et al. 2006a,b).
Agertz, Alves, Annibali, Annibali, Bekki, Bekki, Bekki, Besla, Besla, Bland-Hawthorn, Book, Book, Boylan-Kolchin, Brüns, Busha, Choi, Clemens, Cole, Connors, Connors, de Boer, de Vaucouleurs, de Vaucouleurs, Demers, Diaz, Diaz, Dušan Kereš, D’Onghia, D’Onghia, D’Onghia, Fox, Freedman Woods, Gardiner, Gardiner, Geha, Geha, Gibson, Gnedin, Gordon, Graff, Grcevich, Guhathakurta, Gunn, Guo, Gurtina Besla, Harris, Harris, Harris, Heller, Hernquist, Hoopes, Hopkins, Hopkins, Hopkins, Hopkins, Hunter, James, Jensen, Jin, Kallivayalil, Kallivayalil, Kennicutt, Kerr, Kim, Kim, Koerwer, Kreckel, Krumholz, Lah, Lars Hernquist, Larson, Lehner, Lehner, Lehner, Leitherer, Levine, Lin, Liu, Lu, Lynds, Mac Low, Maloney, Martin, Martin, Mastropietro, Mastropietro, Mathewson, Matthews, McClure-Griffiths, McClure-Griffiths, McCumber, Mellinger, Moore, Murai, Murray, Navarro, Nidever, Nidever, Nigra, Nikolaev, Nitya Kallivayalil, Noël, Odewahn, Olano, Olsen, Olsen, Olsen, Padoan, Pagel, Patton, Phookun, Piatek, Pietrzynski, Pietrzynski, Putman, Putman, Rasmussen, Robertson, Roeland P. van der Marel, Russell, Ružička, Ružička, Sales, Sanders, Sembach, Sembach, Springel, Springel, Springel, Springel, Springel, Stanimirović, Staveley-Smith, Staveley-Smith, Stewart, Struck, Subramaniam, Subramaniam, Suchkov, Swaters, T. J. Cox, Tollerud, Toomre, van den Bergh, van der Marel, van der Marel, van der Marel, van der Marel, Vieira, Vollmer, Wannier, Weil, Weiner, Whitney, Wilcots, Wilcots, Wilcots, Wilke, Yoshizawa, Zaritsky, Zaritsky, Zhao   +161 more
core   +1 more source

The Impact of Stellar Collisions in the Galactic Center

, 2010
We consider whether stellar collisions can explain the observed depletion of red giants in the Galactic center. We model the stellar population with two different IMFs: 1) the Miller-Scalo and 2) a much flatter IMF. In the former case, low-mass main-sequence stars dominate the population, and collisions are unable to remove red giants out to 0.4 pc ...
Davies, M. B., Church, R. P., Malmberg, D., Nzoke, S., Dale, J., Freitag, M.   +5 more
openaire   +2 more sources

Response of the LMC’s Bar to a Recent SMC Collision and Implications for the SMC’s Dark Matter Profile

The Astrophysical Journal
The LMC’s stellar bar is offset from the outer disk center, tilted from the disk plane, and does not drive gas inflows. These properties are atypical of bars in gas-rich galaxies, yet the LMC bar’s strength and radius are similar to typical barred ...
Himansh Rathore, Gurtina Besla, Kathryne J. Daniel, Leandro Beraldo e Silva   +3 more
doaj   +1 more source

The Birth of High Mass Stars: Accretion and/or Mergers?

, 2005
The observational consequences of the merger scenario for massive star formation are explored and contrasted with the gradual accumulation of mass by accretion.
Bernasconi P. A., Boffin H. M. J., Bonnell I. A., Chini R., Clarke C. J., Clarke C. J., Clarke C. J., Hall S. M., Hans Zinnecker, Henning T., John Bally, Kahn F. D., Kaifu N., Kroupa P., Kroupa P., Larson R. B., Larwood J., Portegies Zwart S. F., Price N. M., Uchida Y., Uchida Y., von Zeipel H., Watkins S. J., Watkins S. J., Weigelt G., Yorke H. W.   +25 more
core   +1 more source

Globular Cluster Formation from Colliding Substructure

, 2020
We investigate a scenario where the formation of Globular Clusters (GCs) is triggered by high-speed collisions between infalling atomic-cooling subhalos during the assembly of the main galaxy host, a special dynamical mode of star formation that operates
Burkert, Andreas, Diemand, Juerg, Lin, Douglas N. C., Lupi, Alessandro, Madau, Piero   +4 more
core   +1 more source

Gravitationally Induced Explosive Outflows

The Astrophysical Journal
Over the past decade, there has been a significant increase in the reporting of extensive and luminous star-forming regions associated with explosive outflows.
P. R. Rivera-Ortiz, A. Rodríguez-González, J. Cantó, L. A. Zapata, L. Hernández-Martínez, E. Guzmán Ccolque, M. Fernández-López   +6 more
doaj   +1 more source

Relating molecular structure and low-energy fusion through time-dependent wave-packet dynamics: the 12C+12C collision

EPJ Web of Conferences, 2015
Recent progress in a quantitative study of the 12C+12C sub-Coulomb fusion is reported. It is carried out using full-dimensional, time-dependent wave-packet dynamics, a quantum reaction model that has not been much exploited in nuclear physics, unlike in ...
Diaz-Torres Alexis, Wiescher Michael
doaj   +1 more source

Mg line formation in late-type stellar atmospheres: II. Calculations in a grid of 1D models [PDF]

, 2015
Mg is the alpha element of choice for Galactic population and chemical evolution studies as it is easily detectable in all late-type stars. Such studies require precise elemental abundances, and thus departures from LTE need to be accounted for. Our goal
Y. Osorio, P. Barklem
semanticscholar   +1 more source

Quasi-Periodic Flares from Star-Accretion Disc Collisions

, 2009
We present simulated results of quasi-periodic flares generated by the inelastic collisions of a star bound to a super-massive black hole (SMBH) and its attendant accretion disc.
Alexander, Armitage, Baganoff, Bardeen, Blandford, Bower, Bromley, Carter, Ciufolini, Cunningham, Cunningham, Dabrowski, Damour, Damour, Damour, Damour, Eisenhauer, Evans, Fanton, Frank, Fuerst, Genzel, Genzel, Ghez, Ghez, Ghez, Ghez, Gierlinski, Gillessen, Karas, Karas, Kippenhahn, Kojima, Komossa, Komossa, Komossa, Laor, Lehto, Lindquist, Lixin (Jane) Dai, Miller, Misner, Nayakshin, Nilsson, Norman, Ostriker, Pariev, Perry, Peters, Piran, Rauch, Rauch, Rees, Rees, Reynolds, Roger Blandford, Schödel, Schödel, Semerák, Shen, Spruit, Steven V. Fuerst, Syer, Thorne, Wagoner, Wagoner, Zentsova, Zurek   +67 more
core   +1 more source